package com.unsins.business.jobcenter;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.quartz.JobExecutionContext;
import org.springframework.batch.core.JobExecutionException;
import org.springframework.batch.core.JobParameters;
import org.springframework.batch.core.JobParametersBuilder;
import org.springframework.batch.core.configuration.JobLocator;
import org.springframework.batch.core.launch.JobLauncher;
import org.springframework.scheduling.quartz.QuartzJobBean;

import java.util.Date;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import org.springframework.batch.core.job.SimpleJob;


/**
 * Created by IntelliJ IDEA.
 * User: odpsoft
 * Date: 2008-12-26
 * Time: 12:48:28
 */
public class JobLauncherDetails extends QuartzJobBean {
    /**
     * Special key in job data map for the name of a job to run.
     */
    private static final String JOB_NAME = "jobName";
    private static final Log log = LogFactory.getLog(JobLauncherDetails.class);
    private JobLocator jobLocator;
    private JobLauncher jobLauncher;

    /**
     * Public setter for the {@link JobLocator}.
     *
     * @param jobLocator the {@link JobLocator} to set
     */
    public void setJobLocator(JobLocator jobLocator) {
        this.jobLocator = jobLocator;
    }

    /**
     * Public setter for the {@link JobLauncher}.
     *
     * @param jobLauncher the {@link JobLauncher} to set
     */
    public void setJobLauncher(JobLauncher jobLauncher) {
        this.jobLauncher = jobLauncher;
    }

    protected void executeInternal(JobExecutionContext context) {
        Map jobDataMap = context.getMergedJobDataMap();
        SimpleJob simpleJob = (SimpleJob) jobDataMap.get(JOB_NAME);
        log.info("Quartz trigger firing with Spring Batch jobName="+simpleJob.getName());
        JobParameters jobParameters = getJobParametersFromJobMap(jobDataMap);
        try {
            jobLauncher.run(simpleJob, jobParameters);
        } catch (JobExecutionException e) {
            log.error("Could not execute job.", e);
        }
    }

    /**
     * Copy parameters that are of the correct type over to
     * {@link JobParameters}, ignoring jobName.
     *
     * @param jobDataMap
     * @return a {@link JobParameters} instance
     */
    private JobParameters getJobParametersFromJobMap(Map jobDataMap) {

        JobParametersBuilder builder = new JobParametersBuilder();

        for (Iterator iterator = jobDataMap.entrySet().iterator(); iterator.hasNext();) {
            Map.Entry entry;
            entry = (Entry) iterator.next();
            String key = (String) entry.getKey();
            Object value = entry.getValue();
            if (value instanceof String && !key.equals(JOB_NAME)) {
                builder.addString(key, (String) value);
            } else if (value instanceof Float || value instanceof Double) {
                builder.addDouble(key, (Double) value);
            } else if (value instanceof Integer || value instanceof Long) {
                builder.addLong(key, (Long) value);
            } else if (value instanceof Date) {
                builder.addDate(key, (Date) value);
            } else {
                log.debug("JobDataMap contains values which are not job parameters (ignoring).");
            }
        }

        builder.addLong("currTime", new Long(System.nanoTime()));

        return builder.toJobParameters();
    }

}
